Reversible clinker grinder and driving mechanism therefor



R. s. RILEY REVERSIBLE CLINKER GRINDER AND DRIVING MECHANISM THEREFOR Filed'April 22, 1922 IN VEN TOR.

J ATTO EYS stokers Patented Aug. 3, 1926.

ROBERT sA vroR-n RILEY, 01* VJORQESTER, MASSACHUSETTS, ASSIGNOR To SANFORD RILEY STOKEB COMPANY, OF WORCESTER, MASSACHUSETTS,

MASSACHUSETTS.

A CORPORATION OF Rnv RsIRLn CLINKER GRINDER AND DRIVING"; MECHANISM THEREFOR.

Application filed A ril 22, 1922... Serial n 556,014.

This invention relates to a clinker grinder such as is used in connection with the discharge of ash or refuse from furnaces and and particularly from furnaces equipped with mechanical stokers. It is at times desirable in such stokers to reverse the direction of rotation of the grinder for particular purposes, such as the removal of clinkers which may collect at certain points while the grinder is rotating in its usual direction.

It is the object of my invention to provide a reversible clinker grinder roll in combination with driving mechanism by which the roll may be rotated in either direction.

A further object is to provide a convenient and effective controlling device by which the direction of rotation of the roll may be selectively determined.

Further features of my invention are disclosed in the drawings and will; be more specifically pointed out in the appended claims.

A preferred form of my invention is shown in the drawings, in which Fig. 1 is an end elevation of a clinker grinder, together with my improved driving mechanism therefor;

Fig. 2 is a side elevation of the manual controlling devices, and

Fig. 3 is a vertical sectional view of the driving mechanism taken on the line 33 in Fig. 1.

Referring to the drawings, I have shown a portion of a clinker grinder roll or shaft rotatably mounted in bearings 11, one of which is shown in Fig. 3, and provided with a ratchet wheel 12 secured to the end of the preferably hollow shaft 10 in any convenient manner, as by bolts 13.

The teeth of the ratchet wheel 12 are beveled in both directions so that they may be operatively engaged by feed pawls 14 and 15 pivotally mounted between plates 16 forming a swinging feed arm. The plates 16 may be conveniently pivoted upon shoulders or hubs 17 at the sides of the ratchet wheel 12.

The feed arm 16 is connected by a link 18 to driving mechanism (not shown) by which the feed arm and pawls are regularly oscillated. The outer ends of the feed pawls 14 and 15 are provided with weighted portions 19 and are connected by chains 20 to a three.

armed lever 21 mounted upon a fixed pivot or hearing 22 and provided with a locking stud 23 adapted to enter either one of two holes 24 in a flange 25 fixed on the bracket 23 which supports the lever 21 and its pivot 22.

When the lever is in the position shown in Fig. 1, the weighted end 19 of the feed pawl 15 is raised, rendering this feed pawl inoperative, while the pawl 14 is permitted to engage the ratchet wheel and intermittently advance the clinker grinder rollin a clock-wise direction. When the lever 21 is reversed, the pawl 15 will become operative and the roll will be fed in the opposite direction.

In the usual arrangement of stoker mechanism, the clinker grinder will be below the level 'of the floor indicated at F and the lever 21 will be above the floor, in which case the lever serves not only to control the direction of feed, but also to indicate by its position the direction in which the clinker grinder is being rotated.

I have thus provided an extremely simple 1 and effective device by which the clinker grinder roll may be intermittently advanced in either desired direction and by which the direction of rotation may be reversed as often as is desirable.

Having thus described my invention, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I do claim is 1. In a stoker, a clinker grinder, means to positively drive said grinder in either direction, and controlling devices removed from said driving means to determine the direction of movement thereof.

2. In a stoker, a clinker grinder roll, means to positively rotate said roll in either direction, and means operable from a substantial distance to reverse the direction of movement of said roll.

3. Ina stoker, a clinker grinder roll, separate means for positively rotating said roll in opposite directions, a controlling device and connections from said controlling device to each of said separate means, whereby one only of said devices operates at any given time.

4. In a stoker, a clinker grinder roll, a. ratchet wheel thereon, a pair of feeding pawls for said ratchet wheel, a controlling lever, and connections from each end of said lever to said pawls, for holding one of said pawls in inoperative position while the other of said pawls is in engagement with said ratchet Wheel.

5. In a Stoker, a clinker grinder, a ratchet wheel for said grinder, a feed arm, means to oscillate said arm, a pair of feed pawls oppositely disposed on said arm," and manual means to render either. teed pawl inoperative and the other simultaneously operative.

6 In a stoker, a clinker grinder roll, a ratchet wheel thereon, a pair of feed pawls, each weighted to engage said ratchet Wheel,

a manually controlled device,, and connec- 15 tions through which said device maylift the weighted portion of either pawl and thereby render said'pawl inoperative, the other pawl being always left in operative position.

In testimony whereof I have hereunto 20 affixed my 'si nature.

RO ERT SANFORD RILEY. 

